Clamping mechanism



A. M. BELLONY.

CLAMPING MECHANISM. v APPLICATXON FILED APR.26,1919.

Patented Mar. 15, 1921.

PATENT OFFICE.

ALEXANDER 'M. BELLONY, on THE UNITED s'rArns ARMY.

CLAMPING MECHANISM.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Original application filed April 24, 1919, Serial No. 293,031. Divided and this application filed April 26,

Serial No. 293,029.

(FILED UNDER ACT OF MARCH 3, 1883, 22 STAT. L, 625.)

To all whom it may concern:

Be it known that I, ALEXANDER M. BEL- LONY, captain, corps of engineers, United States Army, a citizen of the United States, stationed at Washington, District of Columbia, have invented an Improvement in Clamping Mechanism, of which the following is a specification.

The invention described herein may be used by the Government, or any of its officers or employees in prosecution of work for the Government, or by any other person in the United States, without payment of any royalty thereon.

This invention relates to a novel clamping mechanism which, while designed more particularly for use in connection with rplledriving machines, is applicable for use in other situations; and the present application covering this invention is a divislonal application of a parent application filed April 24, 1919 Serial No. 293,( )31, and 1s a companion case to an application filed April 26, 1919, Serial No. 293,028 embodying somewhat similar subject-matter.

The object of the invention 1s to provlde a novel clamping mechanism which is extremely simple in construction, very easy to operate, thoroughly efiicient in operation, and durable in use.

With this object in view, and others appearing as the specification proceeds and the nature of the invention more fully develops, the invention resides in a type of clamping mechanism controllable from the bottom of a pile-driving machine, or other object in connection with which it is used.

The invention is graphically illustrated in the accompanying drawing, in which like reference characters designate corresponding parts throughout the several views. The views comprising the drawings may be briefly described as follows:

Figure 1 is a view in side elevatlon of my clamping mechanism, showing the application of the clamping mechanism to a portion of the pile-driving machine, shown partly in section:

Fig. 2 is a view in front elevation thereof.

Fig. 3 is a detail view, partly in section, of the screw, screw-nut and clamp-seat;

Fig. 4 is a top plan view of the clamp-seat.

Referring, now, in detail to the drawing:

A clamping dog 1, is pivotally supported on a pivot pin 2 projecting through depending ears 3, 3 of a bracket 4, adapted to be secured, as by rivets 5, 5, to a support A, in this instance a channel on the upper frame of a pile-driving machine. The pivot pin passes through a transverse slot l in the dog 1, forming a lost-motion connection. The dog 1 carries, at the end thereof opposite thepivotal point, an arm 6, through which is threaded a clamp screw 7 provided with a head 8 seated in a screw nut 9. This nut is preferably hexagonal in shape and is tapped at its upper end for the reception of a clamp seat 10, having a threaded stem 11 adapted to be screwed into the screw nut 9 and into proximity with the head 8. A crank 12 is secured to the end of the screw 7. In operation, it will be understood that, by rotating the crank 12, the clamp screw 7 will be raised or lowered, thus raising or lowering the nut 9 and the seat 10, so that the latter is brought into or out of contact with the channel 13 of the lower frame of a pile-driving machine, or the like.

It will be noted that the clamp seat 10 is rectangular in form and longitudinally grooved, as shown at 13, so as to fit the bottom flange of the channel B. Due to this peculiar construction of the clamp seat, the clamp can be used even though, as in this case, the lower channel B to be clamped is not in parallel relation with the upper channel A, to which the bracket 4 is secured. This use is further facilitated by the lostmotion connection of the clamping-dog 1 on its pivot-pin 2, since limited horizontal ad justment is permitted thereby.

It will be noted that this type of mechanism is controllable from the bottom, of the pile-driving machine instead of from the top, as in the companion form of clamping mechanism disclosed in my copending application filed April 26, 1919, Serial No. 293,028.

Having thus fully described my invention, what I claim as new is:

1. The combination with a transportable structure and a rail for supporting said structure, of a clamping dog pivoted to the structure, a clamp screw threaded through said dog, a screw nut carried by said clamp screw and a clamp seat detachably carried by said screw nut.

2. The combination with a transportable structure and a rail for supporting said structure, of a clamping dog carried by the structure, a clamping through said dog, a screw nut swiveled on said clamping screw and a clamp seat detachably carried by said screw nut.

3. The combination with a transportable structure and a rail for supporting said structure, of a bracket carried by the structure, a pivot pin carried by said bracket, a clamping dog having a 10st motion ,con nection with said pivot'pin,'a clamp screw threaded through said dog, a screw nut carscrew threaded I ried by said clamping screw and a clamp seat detachably carried by said screw nut,

4. The combination with a transportable structure and a rail for supporting said 15 grooved head and a screw stem threaded into 20 said screw nut.

ALEXANDER M. BELLONY. 

